HAC_Technical-Guide

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Cast-In Anchor Channel Product Guide, Edition 1 • 02/2019
1. Anchor
Channel Systems
2. HAC
Portfolio
3. HAC
Applications
4. Design
Introduction
5. Base material 6. Loading
7. Anchor Channel
Design Code
8. Reinforcing
Bar Anchorage
9. Special Anchor
Channel Design
10. Design
Software
11. Best
Practices
12. Instructions
for Use
13. Field Fixes
14. Design
Example
Code Discussion Calculations
Step 5: Steel strength local flexure channel lip and flexure of channel
ESR-3520
section 4.1.3.6
Combined tension and shear loads — flexure moment and channel lip (Interaction )
Channel lip in tension and shear and Flexure of channel in tension. The interaction
check for steel failure of the channel requires the ratio (factored load acting on the
channel lip or Flexure of channel design strength) to be checked using Equation (45)
and Equation (46) in ESR-3520. V
b
ua,x
=0lbs
Point of load application - channel lip
2
,
,
,,
1.0
b
b
b
ua y
ua x
ua
sl sl y sl x
V
V
N
NV V
a
a
ff f
æö
æö
æö
++£
ç÷
ç÷
ç÷
ç÷
ç÷
èø
èø
èø
Point of load application — flexural moment and channel lip
2
,,
,
, ,,
1.0
b
b
u flex ua y
ua x
s flex sl y sl x
MV
V
M VV
aa
f ff
æ öæ ö
æö
++£
ç ÷ç ÷
ç÷
ç÷
ç ÷ç ÷
èø
è øè ø
α = 2 for anchor channels with V
sl,y
≤ N
s,l
α = 1 for anchor channels with V
sl,y
> N
s,l
It shall be permitted to assume reduced values for V
sl,y
corresponding to the use of an
exponent α = 2. In this case the reduced value for V
sl,y
shall also be used in Section
4.1.3.3.1a).
Point of load application — channel lip
β
2
N,sl
= 0.02070
β
2
V,s l,y
= 0.08801
β
2
N,sl
+ β
2
V,s l,y
=0.11
Utilization: 11%
Point of load application — flexural moment and
channel lip
β
N,s,flex
= 0.00654
β′
V,s l,y
= 0.21858
β
N,s,flex
+ β′
V,s l,y
= 0.23
Utilization: 23%
Code Discussion Calculations
Step 6: Channel bolt strength
ESR-3520 section
4.1.3.2.2
Channel bolt strength in tension:
Ф N
ss
≥ N
b
ua
nominal strength corresponding to the T-bolt → N
ss
Nominal tension steel strengths for T-bolts are given in ESR-3520 Table 8-7.
N
ss
for an M16 diameter HBC-C 8.8 F T-bolt = 28,235 lb Ф=0.65
N
b
ua
= 850 lbs
ФN
ss
18353 lbs
N
b
ua
β
N,ss
: ____ x 100 = 5 %
ФN
ss
ESR-3520 section
4.1.3.3.2, 4.1.3.4.2
Channel bolt strength – without lever arm, longitudinal shear included in shear:
Ф V
ss
≥ V
b
ua
V
b
ua
=
V
b
ua,x
2
+ V
b
ua,y
2
nominal strength corresponding to the T-bolt → Vss
Nominal tension steel strengths for T-bolts are given in ESR-3520 Table 8-7.
Vss for an M16 diameter HBC-C 8.8 F T-bolt = 16940 lb
Ф=0.60
V
b
ua,x
= 1750 lbs
V
b
ua,y
= 0 lbs
V
b
ua
= 1750 lbs
Ф V
ss
= 10164 lbs
V
b
ua
β
v,ss
: _____ x 100 = 18 %
Ф V
ss
ESR-3520 section
4.1.3.6
Combined tension and shear loads — Channel bolt (Interaction ) β
2
N,ss
= 0.00214
β
2
v,ss
= 0.02964
β
2
N,ss
+ β
2
v,ss
= 0.03178
Utilization : 4%